diff options
Diffstat (limited to 'drivers/usb/host/isp1760-core.c')
| -rw-r--r-- | drivers/usb/host/isp1760-core.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/drivers/usb/host/isp1760-core.c b/drivers/usb/host/isp1760-core.c deleted file mode 100644 index 727e90ad15bd..000000000000 --- a/drivers/usb/host/isp1760-core.c +++ /dev/null @@ -1,171 +0,0 @@ -/* - * Driver for the NXP ISP1760 chip - * - * Copyright 2014 Laurent Pinchart - * Copyright 2007 Sebastian Siewior - * - * Contacts: - * Sebastian Siewior <bigeasy@linutronix.de> - * Laurent Pinchart <laurent.pinchart@ideasonboard.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2 as published by the Free Software Foundation. - */ - -#include <linux/delay.h> -#include <linux/gpio/consumer.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/usb.h> - -#include "isp1760-core.h" -#include "isp1760-hcd.h" -#include "isp1760-regs.h" -#include "isp1760-udc.h" - -static void isp1760_init_core(struct isp1760_device *isp) -{ - u32 otgctrl; - u32 hwmode; - - /* Low-level chip reset */ - if (isp->rst_gpio) { - gpiod_set_value_cansleep(isp->rst_gpio, 1); - mdelay(50); - gpiod_set_value_cansleep(isp->rst_gpio, 0); - } - - /* - * Reset the host controller, including the CPU interface - * configuration. - */ - isp1760_write32(isp->regs, HC_RESET_REG, SW_RESET_RESET_ALL); - msleep(100); - - /* Setup HW Mode Control: This assumes a level active-low interrupt */ - hwmode = HW_DATA_BUS_32BIT; - - if (isp->devflags & ISP1760_FLAG_BUS_WIDTH_16) - hwmode &= ~HW_DATA_BUS_32BIT; - if (isp->devflags & ISP1760_FLAG_ANALOG_OC) - hwmode |= HW_ANA_DIGI_OC; - if (isp->devflags & ISP1760_FLAG_DACK_POL_HIGH) - hwmode |= HW_DACK_POL_HIGH; - if (isp->devflags & ISP1760_FLAG_DREQ_POL_HIGH) - hwmode |= HW_DREQ_POL_HIGH; - if (isp->devflags & ISP1760_FLAG_INTR_POL_HIGH) - hwmode |= HW_INTR_HIGH_ACT; - if (isp->devflags & ISP1760_FLAG_INTR_EDGE_TRIG) - hwmode |= HW_INTR_EDGE_TRIG; - - /* - * The ISP1761 has a dedicated DC IRQ line but supports sharing the HC - * IRQ line for both the host and device controllers. Hardcode IRQ - * sharing for now and disable the DC interrupts globally to avoid - * spurious interrupts during HCD registration. - */ - if (isp->devflags & ISP1760_FLAG_ISP1761) { - isp1760_write32(isp->regs, DC_MODE, 0); - hwmode |= HW_COMN_IRQ; - } - - /* - * We have to set this first in case we're in 16-bit mode. - * Write it twice to ensure correct upper bits if switching - * to 16-bit mode. - */ - isp1760_write32(isp->regs, HC_HW_MODE_CTRL, hwmode); - isp1760_write32(isp->regs, HC_HW_MODE_CTRL, hwmode); - - /* - * PORT 1 Control register of the ISP1760 is the OTG control register - * on ISP1761. - * - * TODO: Really support OTG. For now we configure port 1 in device mode - * when OTG is requested. - */ - if ((isp->devflags & ISP1760_FLAG_ISP1761) && - (isp->devflags & ISP1760_FLAG_OTG_EN)) - otgctrl = ((HW_DM_PULLDOWN | HW_DP_PULLDOWN) << 16) - | HW_OTG_DISABLE; - else - otgctrl = (HW_SW_SEL_HC_DC << 16) - | (HW_VBUS_DRV | HW_SEL_CP_EXT); - - isp1760_write32(isp->regs, HC_PORT1_CTRL, otgctrl); - - dev_info(isp->dev, "bus width: %u, oc: %s\n", - isp->devflags & ISP1760_FLAG_BUS_WIDTH_16 ? 16 : 32, - isp->devflags & ISP1760_FLAG_ANALOG_OC ? "analog" : "digital"); -} - -void isp1760_set_pullup(struct isp1760_device *isp, bool enable) -{ - isp1760_write32(isp->regs, HW_OTG_CTRL_SET, - enable ? HW_DP_PULLUP : HW_DP_PULLUP << 16); -} - -int isp1760_register(struct resource *mem, int irq, unsigned long irqflags, - struct device *dev, unsigned int devflags) -{ - struct isp1760_device *isp; - int ret; - - if (usb_disabled()) - return -ENODEV; - - /* prevent usb-core allocating DMA pages */ - dev->dma_mask = NULL; - - isp = devm_kzalloc(dev, sizeof(*isp), GFP_KERNEL); - if (!isp) - return -ENOMEM; - - isp->dev = dev; - isp->devflags = devflags; - - isp->rst_gpio = devm_gpiod_get_optional(dev, NULL, GPIOD_OUT_HIGH); - if (IS_ERR(isp->rst_gpio)) - return PTR_ERR(isp->rst_gpio); - - isp->regs = devm_ioremap_resource(dev, mem); - if (IS_ERR(isp->regs)) - return PTR_ERR(isp->regs); - - isp1760_init_core(isp); - - ret = isp1760_hcd_register(&isp->hcd, isp->regs, mem, irq, - irqflags | IRQF_SHARED, dev); - if (ret < 0) - return ret; - - if (devflags & ISP1760_FLAG_ISP1761) { - ret = isp1760_udc_register(isp, irq, irqflags | IRQF_SHARED | - IRQF_DISABLED); - if (ret < 0) { - isp1760_hcd_unregister(&isp->hcd); - return ret; - } - } - - dev_set_drvdata(dev, isp); - - return 0; -} - -void isp1760_unregister(struct device *dev) -{ - struct isp1760_device *isp = dev_get_drvdata(dev); - - if (isp->devflags & ISP1760_FLAG_ISP1761) - isp1760_udc_unregister(isp); - - isp1760_hcd_unregister(&isp->hcd); -} - -MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP"); -MODULE_AUTHOR("Sebastian Siewior <bigeasy@linuxtronix.de>"); -MODULE_LICENSE("GPL v2"); |